High speed transmission cable

A high speed transmission cable comprising

• a conductor set comprising two parallel uninsulated conductors extending along a length of the cable;
• and
• first and second dielectric films disposed on opposite sides of the cable and comprising concentric portions partially concentric with the conductor set and pinched portions on each side of the conductor set, the pinched portions of the first and second dielectric films bonded to one another on each side of the conductor set, each dielectric film comprising:
• a base layer;
• and
• a plurality of shorter protrusions and a taller protrusion disposed on a major surface of the base layer only in the concentric portion of the dielectric film between the pinched portions of the dielectric film, the shorter protrusions disposed between the conductor set and the base layer so that at least some of the shorter protrusions contact the two uninsulated conductors,
• wherein the taller protrusions of the first and second dielectric films are disposed between and separate the two uninsulated conductors and are bonded to, or interlocked with, each other.